{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T11:37:10Z","timestamp":1786361830134,"version":"build-2736575974"},"reference-count":28,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T00:00:00Z","timestamp":1786320000000},"content-version":"vor","delay-in-days":221,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Orthopedics"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Case<\/jats:title>\n                    <jats:p>A 72\u2010year\u2010old Caucasian man presented with left knee osteoarthritis and underwent Mako robotic\u2010assisted total knee arthroplasty (TKA). Two months postoperatively, he complained of mild discomfort in his left quadriceps and limited flexion, with an active range of motion (ROM) from 0\u00b0 to 60\u00b0. At 10 months, his ROM had not improved, and plain radiographs revealed a large, calcified mass in the distal femur, which appeared to be emanating from the tracker pin sites used during Mako robotic\u2010assisted TKA, raising concern for heterotopic ossification (HO). He subsequently underwent excision of the HO and was started on indomethacin.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Surgeons performing robotic\u2010assisted TKAs should be aware of the potential for HO formation at tracker pin sites as a possible complication, particularly in patients presenting with postoperative stiffness.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1155\/cro\/1088976","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T11:22:12Z","timestamp":1786360932000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Heterotopic Ossification at Tracker Pin Sites Following Robotic\u2010Assisted Total Knee 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